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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation S2MFS

Name: S2MFS
Brand: Taiwan Semiconductor Corporation
SKU: S2MFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2MFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S2MFS.pdf

Description:: DIODE GEN PURP 1KV 2A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:3,404

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Product details

Overview

S2MFS from Taiwan Semiconductor is a 2 A, 1000 V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 50 A surge rating (8.3 ms), and 150 °C max junction temperature - used in high-voltage DC-DC converters and switching inverters.

For engineers reviewing the S2MFS datasheet, S2MFS pinout, S2MFS application, or S2MFS equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), forward voltage at 2 A (0.98 V typ @ 25 °C), thermal resistance (R_θJL = 14 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.

Technical Context

The S2MFS is a single-die, unidirectional standard recovery rectifier optimized for high-voltage switching-mode power supplies. Its glass-passivated junction ensures stable reverse leakage (<1 µA @ 25 °C) and robustness against humidity and mechanical stress.

Thermal performance is defined with PCB mounting on 5 mm × 5 mm copper pads: R_θJA = 74 °C/W (ambient), R_θJC = 20 °C/W (case), enabling reliable 2 A continuous operation up to 150 °C junction temperature under derated conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports input rectification in 800 V AC line-derived or high-voltage DC bus applications
I_F	2 A continuous - rated for sustained conduction in compact SMPS output stages
I_FSM (8.3 ms)	50 A - withstands inrush and transient surges without failure in converter startup
V_F @ 2 A, 25 °C	0.98 V (max) - limits conduction loss to ≤2 W at full load, aiding thermal management
T_J max	+150 °C - enables operation in high-ambient industrial environments with appropriate PCB copper area
C_J	12 pF @ 4 V - low junction capacitance minimizes switching noise and EMI in high-frequency converters
R_θJL	14 °C/W - efficient heat transfer to PCB leads supports compact layout without external heatsinking

Pinout & Package

Package: SOD-128 - surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity indicated by cathode band, weight ≈ 0.027 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return)
Cathode	Current exit point during forward conduction; marked with band	Connected to output rail or filter capacitor positive; defines unidirectional current path

Key Features

Feature	Design Value
Glass-passivated junction	Ensures long-term stability of reverse leakage and breakdown voltage under humid or thermally cycled conditions
MSL Level 1	Zero floor-life limitation - can be stored indefinitely and placed directly into reflow without baking
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives for environmentally constrained end equipment
Junction-to-lead thermal resistance	14 °C/W enables direct PCB copper pad conduction cooling without thermal vias or extra metal layers

Applications

DC–DC Converter Output Rectification	Switching Inverter Input Stage
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V outputs from 300–800 V DC bus. IC Role / Device Role / Timing Role: Unidirectional power conversion element conducting only during positive half-cycle of transformer secondary voltage. Use Value: 1000 V V_RRM provides 2× safety margin over 400 V nominal bus, while 0.98 V V_F keeps conduction loss below 2 W at 2 A.	Use Scenario: Input AC rectification in three-phase or single-phase motor drive inverters operating from 400–690 V AC mains. IC Role / Device Role / Timing Role: Standard recovery rectifier converting AC line to high-voltage DC link prior to IGBT/MOSFET bridge switching. Use Value: 50 A I_FSM handles inrush surges during pre-charge; MSL 1 simplifies automated assembly in high-volume production.
Industrial Power Supply Input Bridge	Telecom Rectifier Module
Use Scenario: Discrete leg in full-wave bridge configuration for 230 V AC input front-end in DIN-rail mounted PSUs. IC Role / Device Role / Timing Role: One quadrant of four-diode bridge, conducting during negative half-cycle of AC input. Use Value: SOD-128 footprint allows dense placement; 150 °C T_J max supports operation in enclosed enclosures with ambient up to 85 °C.	Use Scenario: OR-ing diode or hold-up rectifier in -48 V telecom systems requiring high-reliability, low-leakage power paths. IC Role / Device Role / Timing Role: Forward-biased blocking device preventing backfeed between redundant power modules. Use Value: <1 µA reverse leakage at 25 °C ensures minimal standby current loss; halogen-free construction meets NEBS GR-1210 requirements.

DC–DC Converter Output Rectification

Switching Inverter Input Stage

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V outputs from 300–800 V DC bus.

IC Role / Device Role / Timing Role: Unidirectional power conversion element conducting only during positive half-cycle of transformer secondary voltage.

Use Value: 1000 V V_RRM provides 2× safety margin over 400 V nominal bus, while 0.98 V V_F keeps conduction loss below 2 W at 2 A.

Use Scenario: Input AC rectification in three-phase or single-phase motor drive inverters operating from 400–690 V AC mains.

IC Role / Device Role / Timing Role: Standard recovery rectifier converting AC line to high-voltage DC link prior to IGBT/MOSFET bridge switching.

Use Value: 50 A I_FSM handles inrush surges during pre-charge; MSL 1 simplifies automated assembly in high-volume production.

Industrial Power Supply Input Bridge

Telecom Rectifier Module

Use Scenario: Discrete leg in full-wave bridge configuration for 230 V AC input front-end in DIN-rail mounted PSUs.

IC Role / Device Role / Timing Role: One quadrant of four-diode bridge, conducting during negative half-cycle of AC input.

Use Value: SOD-128 footprint allows dense placement; 150 °C T_J max supports operation in enclosed enclosures with ambient up to 85 °C.

Use Scenario: OR-ing diode or hold-up rectifier in -48 V telecom systems requiring high-reliability, low-leakage power paths.

IC Role / Device Role / Timing Role: Forward-biased blocking device preventing backfeed between redundant power modules.

Use Value: <1 µA reverse leakage at 25 °C ensures minimal standby current loss; halogen-free construction meets NEBS GR-1210 requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar standard rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R06	Same 2 A / 600 V rating; TO-220AC package, higher R_θJA (50 °C/W), VF ≈ 1.15 V @ 2 A	Requires heatsink for >1 A continuous; unsuitable for space-constrained SMT designs	Select when through-hole mounting and higher surge tolerance (100 A) are prioritized over size and thermal efficiency
ES2J	2 A / 600 V; SMA package, smaller footprint, R_θJA = 85 °C/W, VF = 0.95 V @ 2 A	Limited to ≤600 V systems; lower surge rating (30 A) and thermal capability than S2MFS	Choose for cost-sensitive, lower-voltage (<600 V) applications where board space is extremely limited

Compared with STTH2R06 and ES2J, the S2MFS uniquely combines 1000 V rating, SOD-128 SMT compatibility, MSL 1 handling, and 14 °C/W junction-to-lead thermal resistance - making it optimal for high-density, high-voltage industrial and telecom power supplies where reliability and manufacturability are critical.

Availability

S2MFS is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supply input stages requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.

Supply support for S2MFS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, MOSFETs, and LED drivers.

The S2MFS belongs to TSC's S2xFS family of standard recovery rectifiers designed specifically for high-voltage, high-reliability surface-mount power conversion in industrial, telecom, and renewable energy systems.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S2MFS?

The S2MFS has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2103). This rating applies across the full operating temperature range and defines the highest reverse voltage the device can block repeatedly without breakdown. The S2MFS is the highest-voltage variant in the S2DFS–S2MFS series, where "M" explicitly denotes the 1000 V grade.

Does the S2MFS have a specified forward voltage (V_F) at 2 A and 125 °C?

Yes, the S2MFS has a maximum forward voltage of 0.98 V at 2 A and 125 °C, per the Electrical Specifications table. This value reflects real-world conduction loss under elevated temperature conditions typical in enclosed power supplies. At 25 °C, V_F is 0.98 V (max) and 0.91 V (typical); the 125 °C data confirms thermal stability of the glass-passivated junction in the S2MFS.

Is the S2MFS compatible with lead-free reflow soldering processes?

Yes, the S2MFS is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its MSL Level 1 rating means it can be exposed to ambient conditions indefinitely without baking prior to reflow. The SOD-128 package is qualified for peak reflow temperatures up to 260 °C, consistent with IPC/JEDEC J-STD-020 standards.

What is the junction-to-lead thermal resistance (R_θJL) of the S2MFS, and why does it matter?

The S2MFS has a typical junction-to-lead thermal resistance (R_θJL) of 14 °C/W, measured with the device mounted on a 5 mm × 5 mm copper pad. This low value indicates highly efficient heat transfer from the die directly into the PCB leads, reducing reliance on large thermal pads or vias. For the S2MFS, this enables 2 A continuous operation without external heatsinking in well-designed layouts - a key advantage over higher-R_θJL alternatives.

How does the S2MFS differ from the S2KFS in terms of voltage rating and application scope?

The S2MFS is rated for 1000 V V_RRM, whereas the S2KFS is rated for 800 V - a 200 V difference that directly impacts system safety margins and topology selection. In applications like 690 V AC-fed motor drives or 800 V DC bus telecom rectifiers, the S2MFS provides necessary headroom where the S2KFS would operate near its absolute limit. Both share identical package (SOD-128), current rating (2 A), and thermal specs, but the S2MFS extends usable voltage range without changing layout or assembly process.

S2MFS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 2 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 1000 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

Operating Temperature - Junction:: -55°C ~ 150°C

S2MFS FAQ

1.How can I place an order for S2MFS through Aetrix?

Please submit a Request for Quotation (RFQ) for S2MFS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for S2MFS reliable?

The price and inventory of S2MFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2MFS is usually 5 days.

3.What payment methods are accepted for S2MFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2MFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2MFS?

S2MFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2MFS order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for S2MFS?

For technical support, including S2MFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2MFS requirements.

6.How does Aetrix verify that S2MFS is sourced from the original manufacturer or authorized distributors?

All S2MFS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that S2MFS meets industry standards.

7.What is the process for return or replacement of S2MFS?

All S2MFS units undergo pre-shipment inspection (PSI). If there is an issue with S2MFS, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The S2MFS part is unused and in its original packaging.

Return procedure for S2MFS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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